ὃν οὐ τύπτει λόγος οὐδὲ ῥάβδος → if words don't get through, neither a beating will | if the carrot doesn't work, the stick will not work either | whom words do not strike, neither does the rod
ἐπιβρύκω και ἐπιβρύχω (Α)τρίζω τα δόντια.